Carburetor air feed



May 9, 1933. s. LONG 1,908,432

CARBURETOR AIR FEED Filed July 9, 1952 31a/vanto@ Seth LongF PatentedMay 9, 1933 UNITED STATES Param' Volg=1=1cr. "f

'SE-TH Lone, or*` SEATTLE, wasraruaron oARBURn'roB. A1B. FEEDApplication filed July 9, 1932. Serial N. 621,603.1'

shoulders', and also to provide a plurality of upwardly slanting holesthrough the conical body and a plurality of holes extending verticallythrough the cup flange together with a plurality of vertical yexteriorgrooves and holes extending radially and horizontally through the bodywhereby air is sucked through the holes and projected` into the streamof gasoline and air entering from the needle valve and the lower end ofthe body respectively and whereby the fuel and air are thoroughly mixed.Further objects areto provide a ring adapted'to normallyrest on the cupflange and to be lifted by the suctional force of' the engine to whichthe device is connected whereby passage of., air through the holes thatare associated with therring is automatically regulated and controlled'by the speed -and suctional force of the engine. Stillfurther '30object-s are to provide the conical-body with a flared smaller, lower,end and to -so dispose said end around the needle fuel valve whereby airis drawn upward and around 4the fuel and whereby the amount of airentering said lower end is varied by the vertical movement of theconicall body which is also caused by the suctional force of the engine.y v

With the above and other objects in view 40 which will appear as thedescription proceeds, the invention consists of the novel construction,adaptation, combination and arrangement of parts hereinafter describedand claimed. These objects are accom- 15 plished by devices illustratedin the accompanying drawing; wherein: Figure 1 is a top plan view of acarburetor whereinmy air feed device isinstalled; Fig. 2 is a view incentral vertical section taken 'on a broken ..50 line 2--2 of Fig. 1 andshowing the instal- 'lation of the airfeed.; andjFig. 3 is a .y

yiew-in perspective of the air `feed vregulatmg device Aand itsassociated ring. d Referring to the `drawing throughout `which likereference numerals-indicate like-1155 parts, the numeral 5 designateslthe iioat chamber of a carburetorfrom which gasoline is Afed through` aconduit 6 and through a needle valve7` finto amixing chamber. Air isdrawn into the mixing chambero through an entry port 9 ,and the mixture.of gasoline and air. passes outwardly vfrom the `mixing chamber througha screen 10 and discharge port 11 that are provided in a head member 12whichis secured tok1the'i'l5 A.top of the mixing chamber.V The foregoingvparts form -nopart of my invention except insofar as theymay enter intocombination therewith. Said` parts -mayf be of varied construction anddesign, `it-lbeing u-nderstooda'm lthat myimproved air feed may beinstalled and used in .connection with any vformpf carburetor to whichit is adapted.'H

. An annular shoulder lf3-isv formed in-.fthe upper interior Vportion ofthe mixing charn- "-75 lber '8 and serves as .a seat for my '.devijce.

Another annular shoulder 14 is formed' in the discharge port 11 ofthehead member 12 lwhere the screen 10 is mounted ,and .serves `asa stopto limit the yu pward movement offsn the ring memberof my feed device.Anda third shoulder 15` is providedy Abetween the aforesaid ltwoshoulders by. the bottom edge i ofthe headjmember 12 whichprojectsfdowynwardly into themixingv chamber Landtermi- 85 nates a shortdistance 4above the shoulder 13. Said last named shoulder limits theupward movement of the main body, portion of--my air feed' device.'It-willythus beapparent that the three shoulders limit,- ideli'nego andcontrol the functions ofthe airafeed improvement which will now bedescribed.

Essentially my invention. comprises a: hollow truncated conical body 16with its vlower or smaller end flare'dor curved outwardly, 95

as at 1.7. The upper portion of said ',bodyplis v ntegra-- Pfovded witha .Cup flange 1.8

which normallyseats on the annular shoulder 18 within the mixing`chamber 8 and its outer annular edge litstsnuglvyand slidably10oVupstanding portion 19 of the main body 'upstanding body portion.A

16 has a vertical outer wall 2O and a curved interior wall portion, asat 21, which merges into the interior slanting wall of the main body. nWhen the cup flange 18 is seated on the annular' shoulder 13 the lowerflared end portion of the body 16 completely envelopes the upper portionof the needle valve 7 as clearly shown in Fig. 2 of the drawing.

A plurality of spaced apart holes or perforations 22 are providedthrough the main body 16 and said holes slant upwardly and inwardly andare slightlyvlarger on the outsideA of the body. A plurality of spacedapart holes 23 extend vertically through the cup flange 18 and grooves24 extend upwardly along the outer vertical wall 20 of the upstandingbody portion 19. At the bottoms of each of said groovesV a hole 25exntends horizontally and radiall through said ring 26 fits slidably andsnugly around the upstanding body portion 19 and is normally seated intothe cup ange 18. Said ring is rounded on its inner, under edge, as at27, so that it does Y not completely obstruct the holes 23 yand 25.

Y My Adevice operates by means of the suction created by the intakestroke of the engine to which it is attached, it being understood thatthe head member 12 of the carburetor is ordinarily connected totheintake of an engine manifold. When the engine is ,first started themembers of my air feed device remain in the normal o'rjseated positlon,as shown 1n,F1g.'2, whereby a comparatively small amount of air is drawnthroughthe device and consequently a rich mixture of gasoline isdelivered to the engine from the needle valve7. The air enters VthroughtheV port 9, passes upwardly through the lower flared end 17 of the body3 4 16, and also into said body through the upwardly slanting holes 22in its side wall.

Some air alsopasses through the holes 23 in the cup flange 18,V a partof which passes upwardly 'through the grooves 24, and some fof which isdirected byV the rounded under edge 27 of the ring 26 through thehorizontal holes '25 intoV the upper portion of the body 16.

- Upon increaseof the engines suctional force the ringf'26 is liftedfrom its seat on the cup flange 18a-nd more air is thus mixed Ywith thefuel. When' the force of suction Abecomes suiiciently strong` said ringis lifted entirely free of the top portion 19 of the body 16, as shownin dotted lines in Fig. 2, and may be stopped by the annular shoulder.'14. Inlthis position of the ring air passes directly upward and ffreely throughthe f holes y23 inthe'cup lflange18 thus supply- "ingra`lean fuel mixture to the engine. Up- 'on excesslve suctional force ofthe engine n supply of air.

the entire body 16 of the device may be lifted until its cup flange 18engages the intermediate annular shoulder 15 and remain there while theengine is running at high speed. In this lifted position of the body itstop portion 19 is again brought into engageable relation witi the liftedring 26 whereby most of the air will pass through the main body 16entering same through its slanting holes 22 and through its flared 75bottomV end 17 An increase of air passes through said flared bottom enddue to the fact that same is lifted whereby the passage VareaY aroundvthetip of the needle valve 7 is increased. Y When the engine is sloweddown S0 and its suctional. force is decreased the reverse movementsofthe body 16 and the ring' 26 take place respectively until they areagain normally seated uponl slow speed of the engine. It will 'now beapparent thatI 85 oline from the vvalve 7 with the air from the'slanting holes 22 through-290 the body 16 of my device form a veryimportant part of my invention. serve to thoroughly vaporize or mixthegaslower ared end 17 in its upward passage 95 A through the main body ofthe device, and the air projected through the radial, horizontal holes25 serves to complete the mixing process. The extension of the body downwhereby its smaller flared end 17 envelops 10o the tip ofthe valve 7 isanother important feature of my' invention. FromA actual tests it isfound that my air feed device effects a considerable saving in fuel byincreasing the mileae per gallon, causes theengine to run 9105 smootengine cool at all times.4

Having thus described -my invention, it

being understood that minor changes in its lv without vibration, andkeeps the construction may be resorted to, without dei-" parting fromthescope and spirit of the invention, what I claim and desire to secure byLetters Patentof theUnited States is The combination with a carburetormixing chamberhaving three spaced apart shoulders in its upper portionand a central upstanding fuel valve in itslower portion, ofk anair feedcomprising a hollow conical truncated body having its smaller, flower,

en d flared outwardly, a cup fiange for the upper portion of' said bodyAadapted to normally seat on the'lowermost of said three shoulders, andadapted forv slidable Amovement between the `lowermost and intermediateshoulders, the lower flared end portion lof said hollow body positionedto envelop the tip of the fuel valve, said hollow body-having apluralityA of spaced'a-part holes extending upwardlyv and inwardltherethrough below the cup iange, said cup iange having a plurality ofholes extending vertically therethrough, a plurality of groovesextending upwardly from the holes through the cup lia-nge along theoutside of the body, a. plurality of holes extending horizontally fromthe lower ends of the grooves through the body, a ring adapted tonormally seat on the cup ianger and adapted to slidably move to theuppermost of the three shoulders, and said ring having a rounded under,inner edge Whereb the holes through the cup langeand throug the upperortion of the body are partly restricted wien the ring is normallyseated on the cup flange.

In testimony whereof I ax my signature.

SETI-I LONG.

